Dating glacier layers
The rising sea has brought wave action against its flank, exposing the layers of sand and gravel inside it and leaving behind a beach of boulders. Wiens has a Ph D in Physics, with a minor in Geology.His Ph D thesis was on isotope ratios in meteorites, including surface exposure dating.
Further evidence comes from the complete agreement between radiometric dates and other dating methods such as counting tree rings or glacier ice core layers.
Many Christians have been led to distrust radiometric dating and are completely unaware of the great number of laboratory measurements that have shown these methods to be consistent.
Many are also unaware that Bible-believing Christians are among those actively involved in radiometric dating.
Drumlins are thought to form underneath the edges of large glaciers by moving ice rearranging the coarse sediment, or till, there.
They tend to be steeper on the stoss side, the upstream end relative to the glacier's motion, and gently sloping on the lee side.
(This is the opposite of the sculpted bedrock forms called roches moutonneés.) Drumlins have been studied using radar beneath Antarctic ice sheets and elsewhere, and the Pleistocene continental glaciers left behind thousands of drumlins in high-latitude regions in both hemispheres.This drumlin in Clew Bay, Ireland, was laid down when the global sea level was lower.He is presently employed in the Space & Atmospheric Sciences Group at the Los Alamos National Laboratory.Radiometric dating--the process of determining the age of rocks from the decay of their radioactive elements--has been in widespread use for over half a century.There are over forty such techniques, each using a different radioactive element or a different way of measuring them.It has become increasingly clear that these radiometric dating techniques agree with each other and as a whole, present a coherent picture in which the Earth was created a very long time ago.